I have an OS 70 four stroke for the Cub. I have though I could use this if I get a 60 4 Star. The thing that really suprised me was how often I lost orientaiton on the Cub. Several times I ended up inverted, and didn't realise I was there untill the plane was heading earthward. I didn't do the take off either. Like I said. I swallowed my pride and let an instructor do the take off and most of the flying with me on a buddy box..